摘要:

AbstractThis paper presents an optimal feedback controller capable of driving a non‐linear control system from an arbitrary initial state to a fixed final state in minimum time. The controller is based on a feedforward multilayer neural network trained repeatedly using open‐loop optimal control data which densely span the field of extremals of the non‐linear system. The effectiveness of the controller is clearly demonstrated by a simulation on a two‐link robot manipulator. The effect of sensor/actuator noise and parameter variation is also included to confirm the robustness of the con

ISSN:0143-2087    

DOI:10.1002/oca.4660140102

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractThe objective of this study is to examine two analytical methods for the design sensitivity analysis of optimal control problems and to develop the analyses necessary for the application of the methods to thermal systems. The two methods are the direct differentiation method and the adjoint variable method. Results for these methods are compared with those obtained using central finite difference approximations for design sensitivity analysis. The adjoint variable method has the potential to reduce significantly computational times for design sensitivity analysis while sacrificing only a small amount of accuracy. As the number of functional requiring design sensitivity analysis increases, however, the adjoint variable method becomes less attractive and the direct differentiation method becomes more attractive.

ISSN:0143-2087    

DOI:10.1002/oca.4660140103

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractTwo control strategies, unity‐feedback and modified Smith predictor configurations, are introduced to design non‐square decoupling control systems. The complete decoupler has the same function structure for both systems. The root locus approach is extended to design the multiloop controllers for both configurations. Pole–zero cancellation is not included in the design procedures for the respective control strategies, so the control laws can handle minimum or non‐minimum phase reachable decoupling processes. The tuning region of the appropriate decoupling control configuration is determined through internal stability analysis. From the analysis we observe that if the product of the tuning parameter and the pseudogain of the subsystem is much smaller than unity, the control effects for the two decoupling control systems are no different. Since both decoupling controllers are essentially based on the process model, the control strategies are implemented in adaptive control schemes in the simulation e

ISSN:0143-2087    

DOI:10.1002/oca.4660140104

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractAn output feedback pole assignment method is presented which seeks to achieve a robust solution where the assigned poles are as insensitive as possible to perturbations in the closed‐loop system. The freedom available to obtain a robust solution is realized by assigning poles not to exact locations but within specified regions of the complex plane. The problem is formulated as a non‐linear programming problem with a set of non‐linear constraints of matrix‐valued functions as well as a set of linear constraints. A numerical algorithm is presented in two forms and the results obtained are compared with those generated from other algorithms for a series of test examples taken from the lit

ISSN:0143-2087    

DOI:10.1002/oca.4660140105

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractIn this paper a decomposition method is introduced for the solution of the optimal Kalman filter gains in singularly perturbed systems by solving two reduced‐order linear equations. The decomposition is achieved via the use of the Chang transformation, which is applied to the Hamiltonian matrix of the singularity perturbed Kalman filter. Since the decoupling transformation can be obtained up to an arbitrary degree of accuracy at very low cost, this approach produces an efficient numerical method for obtaining the Kalman filter gains. A numerical example is given to demonstrate the efficiency of the metho

ISSN:0143-2087    

DOI:10.1002/oca.4660140106

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

ISSN:0143-2087    

DOI:10.1002/oca.4660140101

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY